1. 13 Jun, 2009 12 commits
    • Ingo Molnar's avatar
      perf stat: Add feature to run and measure a command multiple times · 42202dd5
      Ingo Molnar authored
      Add the --repeat <n> feature to perf stat, which repeats a given
      command up to a 100 times, collects the stats and calculates an
      average and a stddev.
      
      For example, the following oneliner 'perf stat' command runs hackbench
      5 times and prints a tabulated result of all metrics, with averages
      and noise levels (in percentage) printed:
      
       aldebaran:~/linux/linux/tools/perf> ./perf stat --repeat 5 ~/hackbench 10
       Time: 0.117
       Time: 0.108
       Time: 0.089
       Time: 0.088
       Time: 0.100
      
       Performance counter stats for '/home/mingo/hackbench 10' (5 runs):
      
          1243.989586  task-clock-msecs     #     10.460 CPUs    ( +-   4.720% )
                47706  context-switches     #      0.038 M/sec   ( +-  19.706% )
                  387  CPU-migrations       #      0.000 M/sec   ( +-   3.608% )
                17793  page-faults          #      0.014 M/sec   ( +-   0.354% )
           3770941606  cycles               #   3031.329 M/sec   ( +-   4.621% )
           1566372416  instructions         #      0.415 IPC     ( +-   2.703% )
             16783421  cache-references     #     13.492 M/sec   ( +-   5.202% )
              7128590  cache-misses         #      5.730 M/sec   ( +-   7.420% )
      
          0.118924455  seconds time elapsed.
      
      The goal of this feature is to allow the reliance on these accurate
      statistics and to know how many times a command has to be repeated
      for the noise to go down to an acceptable level.
      
      (The -v option can be used to see a line printed out as each run progresses.)
      
      Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
      Cc: Mike Galbraith <efault@gmx.de>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
      LKML-Reference: <new-submission>
      Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      42202dd5
    • Ingo Molnar's avatar
      perf stat: Reorganize output · 44175b6f
      Ingo Molnar authored
       - use IPC for the instruction normalization output
       - CPUs for the CPU utilization factor value.
       - print out time elapsed like the other rows
       - tidy up the task-clocks/cpu-clocks printout
      
      Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
      Cc: Mike Galbraith <efault@gmx.de>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
      LKML-Reference: <new-submission>
      Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      44175b6f
    • Jaswinder Singh Rajput's avatar
      perf_counter, x86: Update AMD hw caching related event table · f4db43a3
      Jaswinder Singh Rajput authored
      All AMD models share the same hw caching related event table.
      
      Also complete the table with more events.
      Signed-off-by: default avatarJaswinder Singh Rajput <jaswinderrajput@gmail.com>
      Cc: Robert Richter <robert.richter@amd.com>
      Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
      Cc: Mike Galbraith <efault@gmx.de>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
      LKML-Reference: <1244835381.2802.2.camel@ht.satnam>
      Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      f4db43a3
    • Jaswinder Singh Rajput's avatar
      perf_counter, x86: Check old-AMD performance monitoring support · 4d2be126
      Jaswinder Singh Rajput authored
      AMD supports performance monitoring start from K7 (i.e. family 6),
      so disable it for earlier AMD CPUs.
      Signed-off-by: default avatarJaswinder Singh Rajput <jaswinderrajput@gmail.com>
      Cc: Robert Richter <robert.richter@amd.com>
      Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
      Cc: Mike Galbraith <efault@gmx.de>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
      LKML-Reference: <1244714289.6923.0.camel@ht.satnam>
      Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      4d2be126
    • Marti Raudsepp's avatar
      perf_counter: Fix stack corruption in perf_read_hw · d5e8da64
      Marti Raudsepp authored
      With PERF_FORMAT_ID, perf_read_hw now needs space for up to 4 values.
      
      Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
      Cc: Mike Galbraith <efault@gmx.de>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
      LKML-Reference: <new-submission>
      Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      d5e8da64
    • Paul Mackerras's avatar
      perf_counter: Fix atomic_set vs. atomic64_t type mismatch · 87847b8f
      Paul Mackerras authored
      Using atomic_set on an atomic64_t variable gives a compiler
      warning on powerpc, and won't give the desired result at runtime.
      This fixes an instance of this error in the perf_counter code.
      Signed-off-by: default avatarPaul Mackerras <paulus@samba.org>
      Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
      LKML-Reference: <18995.20490.979429.244883@cargo.ozlabs.ibm.com>
      Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      87847b8f
    • Frederic Weisbecker's avatar
      perf annotate: Print a sorted summary of annotated overhead lines · 971738f3
      Frederic Weisbecker authored
      It's can be very annoying to scroll down perf annotated output
      until we find relevant overhead.
      
      Using the -l option, you can now have a small summary sorted per
      overhead in the beginning of the output.
      
      Example:
      
      ./perf annotate -l -k ../../vmlinux -s __lock_acquire
      
      Sorted summary for file ../../vmlinux
      ----------------------------------------------
      
         12.04 /home/fweisbec/linux/linux-2.6-tip/kernel/lockdep.c:1653
          4.61 /home/fweisbec/linux/linux-2.6-tip/kernel/lockdep.c:1740
          3.77 /home/fweisbec/linux/linux-2.6-tip/kernel/lockdep.c:1775
          3.56 /home/fweisbec/linux/linux-2.6-tip/kernel/lockdep.c:1653
          2.93 /home/fweisbec/linux/linux-2.6-tip/arch/x86/include/asm/irqflags.h:15
          2.83 /home/fweisbec/linux/linux-2.6-tip/kernel/lockdep.c:2545
          2.30 /home/fweisbec/linux/linux-2.6-tip/kernel/lockdep.c:2594
          2.20 /home/fweisbec/linux/linux-2.6-tip/kernel/lockdep.c:2388
          2.20 /home/fweisbec/linux/linux-2.6-tip/kernel/lockdep.c:730
          2.09 /home/fweisbec/linux/linux-2.6-tip/kernel/lockdep.c:730
          2.09 /home/fweisbec/linux/linux-2.6-tip/kernel/lockdep.c:138
          1.88 /home/fweisbec/linux/linux-2.6-tip/kernel/lockdep.c:2548
          1.47 /home/fweisbec/linux/linux-2.6-tip/arch/x86/include/asm/irqflags.h:15
          1.36 /home/fweisbec/linux/linux-2.6-tip/kernel/lockdep.c:2594
          1.36 /home/fweisbec/linux/linux-2.6-tip/kernel/lockdep.c:730
          1.26 /home/fweisbec/linux/linux-2.6-tip/kernel/lockdep.c:1654
          1.26 /home/fweisbec/linux/linux-2.6-tip/kernel/lockdep.c:1653
          1.15 /home/fweisbec/linux/linux-2.6-tip/kernel/lockdep.c:2592
          1.15 /home/fweisbec/linux/linux-2.6-tip/kernel/lockdep.c:1740
          1.15 /home/fweisbec/linux/linux-2.6-tip/kernel/lockdep.c:1740
      
      [...]
      
      Only overhead over 0.5% are summarized.
      Signed-off-by: default avatarFrederic Weisbecker <fweisbec@gmail.com>
      Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
      Cc: Mike Galbraith <efault@gmx.de>
      Cc: Paul Mackerras <paulus@samba.org>
      LKML-Reference: <1244844682-12928-2-git-send-email-fweisbec@gmail.com>
      Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      971738f3
    • Frederic Weisbecker's avatar
      perf annotate: Print the filename:line for annotated colored lines · 301406b9
      Frederic Weisbecker authored
      When we have a colored line in perf annotate, ie a middle/high
      overhead one, it's sometimes useful to get the matching line
      and filename from the source file, especially this path prepares
      to another subsequent one which will print a sorted summary of
      midle/high overhead lines in the beginning of the output.
      
      Filename:Lines have the same color than the concerned ip lines.
      
      It can be slow because it relies on addr2line. We could also
      use objdump with -l but that implies we would have to bufferize
      objdump output and parse it to filter the relevant lines since
      we want to print a sorted summary in the beginning.
      Signed-off-by: default avatarFrederic Weisbecker <fweisbec@gmail.com>
      Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
      Cc: Mike Galbraith <efault@gmx.de>
      Cc: Paul Mackerras <paulus@samba.org>
      LKML-Reference: <1244844682-12928-1-git-send-email-fweisbec@gmail.com>
      Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      301406b9
    • Linus Torvalds's avatar
      Merge branch 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jlbec/configfs · f3ad1165
      Linus Torvalds authored
      * 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jlbec/configfs:
        configfs: Rework configfs_depend_item() locking and make lockdep happy
        configfs: Silence lockdep on mkdir() and rmdir()
      f3ad1165
    • Linus Torvalds's avatar
      Merge branch 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6 · d645727b
      Linus Torvalds authored
      * 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6: (30 commits)
        [S390] wire up sys_perf_counter_open
        [S390] wire up sys_rt_tgsigqueueinfo
        [S390] ftrace: add system call tracer support
        [S390] ftrace: add function graph tracer support
        [S390] ftrace: add function trace mcount test support
        [S390] ftrace: add dynamic ftrace support
        [S390] kprobes: use probe_kernel_write
        [S390] maccess: arch specific probe_kernel_write() implementation
        [S390] maccess: add weak attribute to probe_kernel_write
        [S390] profile_tick called twice
        [S390] dasd: forward internal errors to dasd_sleep_on caller
        [S390] dasd: sync after async probe
        [S390] dasd: check_characteristics cleanup
        [S390] dasd: no High Performance FICON in 31-bit mode
        [S390] dcssblk: revert devt conversion
        [S390] qdio: fix access beyond ARRAY_SIZE of irq_ptr->{in,out}put_qs
        [S390] vmalloc: add vmalloc kernel parameter support
        [S390] uaccess: use might_fault() instead of might_sleep()
        [S390] 3270: lock dependency fixes
        [S390] 3270: do not register with tty_register_device
        ...
      d645727b
    • Linus Torvalds's avatar
      Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic · cd166bd0
      Linus Torvalds authored
      * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic:
        add generic lib/checksum.c
        asm-generic: add a generic uaccess.h
        asm-generic: add generic NOMMU versions of some headers
        asm-generic: add generic atomic.h and io.h
        asm-generic: add legacy I/O header files
        asm-generic: add generic versions of common headers
        asm-generic: make bitops.h usable
        asm-generic: make pci.h usable directly
        asm-generic: make get_rtc_time overridable
        asm-generic: rename page.h and uaccess.h
        asm-generic: rename atomic.h to atomic-long.h
        asm-generic: add a generic unistd.h
        asm-generic: add generic ABI headers
        asm-generic: add generic sysv ipc headers
        asm-generic: introduce asm/bitsperlong.h
        asm-generic: rename termios.h, signal.h and mman.h
      cd166bd0
    • Linus Torvalds's avatar
      Merge branch 'drm-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6 · 6b702462
      Linus Torvalds authored
      * 'drm-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6: (50 commits)
        drm: include kernel list header file in hashtab header
        drm: Export hash table functionality.
        drm: Split out the mm declarations in a separate header. Add atomic operations.
        drm/radeon: add support for RV790.
        drm/radeon: add rv740 drm support.
        drm_calloc_large: check right size, check integer overflow, use GFP_ZERO
        drm: Eliminate magic I2C frobbing when reading EDID
        drm/i915: duplicate desired mode for use by fbcon.
        drm/via: vfree() no need checking before calling it
        drm: Replace DRM_DEBUG with DRM_DEBUG_DRIVER in i915 driver
        drm: Replace DRM_DEBUG with DRM_DEBUG_MODE in drm_mode
        drm/i915: Replace DRM_DEBUG with DRM_DEBUG_KMS in intel_sdvo
        drm/i915: replace DRM_DEBUG with DRM_DEBUG_KMS in intel_lvds
        drm: add separate drm debugging levels
        radeon: remove _DRM_DRIVER from the preadded sarea map
        drm: don't associate _DRM_DRIVER maps with a master
        drm: simplify kcalloc() call to kzalloc().
        intelfb: fix spelling of "CLOCK"
        drm: fix LOCK_TEST_WITH_RETURN macro
        drm/i915: Hook connector to encoder during load detection (fixes tv/vga detect)
        ...
      6b702462
  2. 12 Jun, 2009 28 commits